9
Preparing for departure continued…
3.
Return back to the FMC. Now press LSK 6R to go to the PERF INIT page.
Enter a gross weight of 176.3 into LSK 1L. The gross weight can be obtained
from the FSX fuel/payload dialogue. The ZFW (Zero Fuel Weight) will
automatically be calculated from the gross weight. Enter a value of 9.4
into the RESERVES field, which is LSK 4L. The cruise altitude will be
35,000ft. Enter this into LSK 1R. Generally, you fly at an odd altitude if you
are going from west to east and an even altitude if you are going from
east to west. Enter a cost index (CI) of 80 into LSK 2R. A lower CI means
the aircraft will fly more efficiently, but also slower. Enter -37 into LSK 3R
and 25 into LSK 4R. Press LSK 6R to go to the THRUST LIM page.
4.
As a result of having a large aircraft, light load and a long runway it will be
possible to use a derated take-off for the flight today. A derated take-off
is when the aircraft engines do not spool up to full power for take-off. This
reduces engine wear, fuel consumption and noise pollution. We will be
taking a 20% derate for the take-off today. Select this by pressing LSK 4L.
Now press LSK 6R to go to the TAKEOFF page.